Compressor-pump for r efrigerating-mach in es



(No Model.)

2 Sheets- Sheet l. E. PENNEY.

COMPRESSOR PUMP FQB. RBFRIGERATING MACHINES. No. 367,726. Patented Aug. 2, 1887.

Y i ,mi

2 Sheets-Sheet 2.

(No Model.)

E. PENNEY.

COMPRESSOR PUMP PoR RBPRIGPRATING MACHINES. No. 367,726.

Patented Aug. 2, 1887.

MESH

Www/$41094 @Miren STATES PATENT @Erica EDGAR P ENNEY, or wAYNEsBo'RonGn, PENNSYLVANIA.

t comeaesso'R-PUMP Fon REFRieERA'TlNe-MACHINES.

SPECIFICATION forming part of LetterslPatent No. 367,726, dated August 2, 1887,

' Application tiled October 1'2, 1886. Serial No. 216,023. (No model.) l

T all whom it may concern:

Be it known lthat I, EDGAR PENNEY, a citizen of the United States, residing at Viaynesborough, in the county of Franklin and State ofPennsylvania,h-ave invented certain new and useful Improvements in Compressor-Pumps for Refrigerating-lllachines; and I do hereby' declare the following to be'a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to compressor-pumps for ice-machines and refrigerating apparatus; and it consists in improvements and details of construction, which will be herei nafter fully del scribed, and the invention particularly pointed out in the claims.

' shown in my patent, No. 363,672, May 24,

The base B is provided with a downwardlyextending sleeve, B', surrounding the pistonrod, the same being enlarged interiorly from a point near the cylinder to form a stuffingnut C` is supplied with oil to -assist in lubribox for the piston-rod. Vithin this sleeve near its center is located the gland b and at the lower end a gland, b. The stuingbox is closed at its lower end by the cap-nut C, provided Awith the screw-extension c, to which is attached a' smaller cap-nut, c', thespace between the projection c and the nutc' being filled with a suitable packing. The glands b b' are reduced around their centerfportion and provided with openings in such reducedl portion extending into the pistonrod. The upper gland, b, has an annular recessvagainst the piston-rod, as shown in the drawings. The space in the sleeve B' not occupied by glands b and b' is filled with any,p'referr ed form of packing. l

The space between the sleeve B andthe capeating the piston-rod and .sealing the same to plied with oil by a pipe, P', connecting with the annular space around the same. The other end of the said pipe is connected to a pump,

O', by means of which oil is supplied to this gland under such Ipressureas to securely seal the cylinder and prevent the escape of gas therefrom. The base B is provided with the pump-inlet 1, in which is lfitted the cock F. Between this cock and the pump barrel or cylinder the pipe I connects with the passageY l. This pipe is provided with a valve, i, and

such pipe may communicate with the open air and also with a reservoir containing a liquefied form of the gas used in the compressor-pump and its connected apparatus. The pump barrel or cylinder is surrounded by a jacket, G, and is provided with a hood or bonnet, D, from which lead passages 2 and 3. The pumplbari rel is provided at a short distance above its lower end with -an annular Bange, E. The jacket G is provided at its base with a ring, e, having the annular projection e', and the j acket is secured to the tlange by bolts e, passing through the annular projection of the ring e into the ange E, a suitable packing being interposed between them. This annular daiige may be-constructed with a downward projection, e3, covering the end of the iiange. A

. supplemental jacket, G', is interposed between ,cylinder can be reached and the cylinder de tached when it may become necessary without detaching the jacket G from the cylinder. It will also beseen that if necessary the jacket G canbe' detached.

y The inlets supply water to the jacketfor the purpose of keeping the cylinder cool. The outlets, carrying off the water after it has reached IOO a certain height, enable aconstant circulation to be kept up in the jacket. Y

The main body of the piston K has its periphery tted to the interior of the cylinder, and provided `with packing-rings. This main portion of the piston is in the form of a cylinder, having at its lower end arms lc, extending to a hub at the center,`to which the piston-rod k' is attached. The upper part of the pistou is provided with an' annular recess, K2, in which is fitted the valve-seat K', which is attached to the main portion of the piston by the screwbolts K3, with a suitable packing'interposed between the valveseat and the shoulder of the recess K2. This valveseat is of cylindrical for'm, having arms K4 extending to a central hub, in which is mounted the stem Z of the valve L. The limit of the movement of the valve is determined by the nut Z' on the end of the valve-stem, and a spring, Z', is placed underneath the valve. This spring is of ,sufficient strength to nearly counterbalance -the weight of the valve, so that an accurate and easy movement to the same is secured.

This construction of the piston secures a removable seat for the valve, with a packed joint midway of the valve, which prevents all leaking and avoids the employment of small parts, which are more liable to become broken or disengaged and damage to the pump arise therefrom.

lBetween the cylinder A and the hood D is interposed a ring, J, having the downwardlyprojecting annular flange j, fitting within a recess inthe upper part of the cylinder, with a packingy between the two. It is also provided with the upwardly-extending annular flange j' and a valve-seat, j". The hood or bonnet D is attached to the cylinder by bolts d, extending through lprojections on said hood, the ring J, and a flange at the upper end of the cylinder. Resting upon the seat j2 of ring J is a movable cylinder-head or large valve, M, of the same size as the interior of the cylinder. The hood I) has arms d' extending interiorly to a central hub, (Il. Between'these arms and the cylinder-head or valve Mis interposed a strong spring, N, which serves to keep the part M in place in the ordinary working of the pump, but which will permit the same to yield in case of anything solid becoming interposed between the piston and such valve or cylinder-head, or when for any reason the secondary or working valve shall fail to yield and give passage to the condensed fiuid in the pump or cylinder. This secondary valve R rests upon a removable seat, R', inserted in the valve or cylinder-head M. A sleeve, r, projects upwardly from the same, engaging a guide, 1", depending from the hub di. A spring, a", is interposed between the hub d? and the va1ve'head. The spring r is very much weaker than the spring N, and hencein the ordinary working of the pump the valve R yields and permits the passage of lthe contents of the pump-cylinder, while thevalve or cylinder head M remains stationary.

It willbe here noted that the valve=seats are all separable from the other parts of the construction,'and are therefore easily removed and replaced when they have become. unduly worn without replacing the other portions of the structure. A

The gas or fluid to be compressed by the pumpis admitted to thepu nip-cylinder through the inlet 1, and is forced outward by the piston through outlet 2, attached to the upper portion ofthe hood or bonnet. Vhen it is desired to free the pump from the gas or fluid therein in order to examine or repair the Sallie, the cocks F in the inlet 1 and F' in inlet 2 are closed and the valve i and its air connection and the valve in the outlet 3 opened, by which means the gas or duid within the pump Ais speedily replaced Iby air and the examination or repairs can be proceeded with.

In order to provide a means for the attachment of a pressure-gage, the following construction is employed: rIhe liange upon the outside of the upper en d of the cylinder is provided with an enlargement, S, which. has a screwthreaded recess, S', therein. This recess is connected with the extreme upper portionof the in, as shown iu the drawings.

In the construction shown in Fig. 2th e main portion ofthe piston isconstructed very much the same as that shown in Fig. l. The recess for the valve-seat isl very much shallower and the main part of the valve is provided immediately below this seat with an internal annular projection, la, which is screw-threaded and .receives a screw-thread on the valve-seat k". A suitable packing is interposed between the valve-seat and the annular projection la to prevent leakage. The valveinthis construetion has the tubular stem kl, which is guided by vertical fianges kH on the valve-seat, and a spring, k, extends within this tubular portion of the valve and encircles a projection of the piston-rod lc. The strength'of this spring, as

stated in regard to the other construction, is

such as "to nearly counterbalance the weight of the valve.

Thejam-nuts 10 and 11 on the tubular stern ofthe valve serve to limit the movement of the valve,which can be adjusted thereby.

In. Fig. 3 I have shown the valve attached to the pistonA in `the same manner as thatjust described. The valve-seat in this case, however, is provided with a tubular guide, k2", projecting from thebottom of the same, the valve IOO IIC

in this case being provided with astem, k, and

counterbalanced by a spring, '22, surrounding the, tubular guide. Jam-nuts and 11 are employed in this case to adjust the movement of the valve.

The delivery'- valve i'n the'construction shownlin Fig. 2 differs somewhat from that of Fig. l, Au annular ring, J, similar in coustruction to that hereto-fore described, is employed in t-his arrangement. The ring J in this instance is provided with two or more bosses, J1, to which is secured by screw-bolts a guide-frame. X. A similar movable cylinder-head or valve, M', is employed. This valve: is seat-ed upon the ring J in the same man nel; as the valve M. rlhe seat R' for the smaller valve y is inserted in the cylinder-head in the same.

' in the guidati-ame and at its lowerend screwed into an annular projection, m', of the cylinderhead M'. The lower annular portion of this Stem, \vhich connects with the movable cy-lin der-head M', is connected with the tubular -stem M'l by arms m2. Inside this tubular stem is the stem ofthe smaller valve, R, and a spring, m", is interposed between the stem n? and the valve R. Both the stems'm2 and the stem of the smaller valve extend 'above the guiding frame X, so that when-the dome or hood D is removed these stems can be clamped bythe workmen land revolved in their seats wheneverit is desired to do so, as is Vsometimes the case in redtting and Irepairing these parts. The hood Demployed in this case has no connection with the valve mechanism,'and is se cured to the cylinder-top in a manner similar to that shown in Fig. l1. In case of repairs it can be removed without removing any part of the valve construct-ion, which is one ot the ad- Y vantages of this arrangement.

It will be seen in this construction that the movable cylinder-head or valve is guided in" ils movements by the stem M2. In order to further guide thisy'portion of the valve construction at its lower endl the ring J is provided with guiding-Hajnges J1". j n

The operation ot' this modified form of my delivery-valve construction is similar to that shown in Fig. l, and hereinbefore described. Tl1e\ smaller valve, R, is designed to do the work and receive the wear and tear. The large valve or cylinder-head M is made'yielding more for the purpose of preventing damage to the structure in case anything solid should be interposed between the piston and the cylinder or in the ease of accidental disarragement of the valve R. the piston and the small delivery-valves may be as durable as possible, suchl valves and their seats are made of steel.

Both the pistouand the cylinder,inst.e'ad of being provided with ore'valve, may be provided with any desired numbcrrof valves by a suitable modification of the construction. It will be noticedy that the construction 'of the piston in each instance furnishes the same with In order thatthe small valve of 'an even upper surface, and that the arrangement of the delivery valve or valves gives the cylinder head a like construction. Consequently the piston can be given such a. movement that'its upward stroke will terminate when the surface of the cylinder is but a slight distance from the cylinder-head, whereby the expulsion of the entire contents ofthe cylinder is secured.

rlhe constructions of piston shown herein are not claimed, as they are included in an application tiled' by me on the 9th day of July, 1887.

What I claim, and desire to secu re by Letters'fPatent, is

l. In a compressor-pump for iceemachines, a. horizontal base, in combination with a cylinder havingf solid walls mounted on and attached to the base, substantially as described, and provided with an exterior flange a short distance above the base, and a water-jacket surrounding the cylinder above said tiange and attached thereto, substantially as described.

2. In a-comprcssor-pnnip for ice-machines, a

. to the base, substantially as described,and provided wth an exterior tiange a short distancev ,above the base, awater-jacke`t surrounding said cylinder above said iange and connected thereto, and a detachable jacket between the fla-nge and the base, substantial] y as described.-

l 3. A compressor-pump for ice machines, having a stuiing-box for the piston-,rod ofthe same, said stuiing--box being provided with a central gland anda-gland at the lower end of IOO the same, an oil-reservoir lconnected with the lower gland, and means for supplying oil lunder pressure to the central gland, substantially as described.

4. A compressor-pump for an ice-niachine,V

having an inlet-passage and an outlet-passage and stop-cocks controlling the same,provided witha pipe communicating with the open air, y

connected with the inletlpassage between the stop-cock and the cylinder of the pump, and a pipe connecting with the, outlet-passage between the cylinder and stop-coek, the said IIO pipes having cocks controlling the same, sub` l stantially as described. A

` 5. The combination, withacyl-inder of a4 compressor-pump for ice-machines and a water-jacket su rrounding the same, of a stuffing- .hox attached to said jacket, and a tube passing through saidstuftng--box and connecting with the interior of the cylinder, the said tube having a valve-'seat and valve Kat its inner end 'i in close proximity to `the cylinder, substantially as described.

6. The combination, with the cylinder of a compressor-pump f or ice-machines, of the delivery valve or valves extending beyond the l every part of the same, whereby the said hood or dome may be removed and the valve orvalves be left in operative positionand rela-v tion, substantially as described.

compressorpump for ice-machines, of the guiding-frame connected therewith, the delivery valve or valves having a stem or stems projecting beyond the guiding-frame, the Whole ot' said frame and valves extending beyond the end ofthe cylinder, aud the hood or dome removably-connected to tbe cylinder and inclosing the valve or valves and the guiding-frame,

. but disengaged therefrom, 'whereby the dome o r hoodA may be removed and the valve or valves left in operative position and relation,

and the operator be given access to the .stem or stems of the valve or valves, substantially as described.

8. The combination, with the cylinder of an, compressor-pump for ice-machines, of the cyl-A inder-closing'devices consisting of the annular ring J, the guiding-frame attached thereto, r the movable cylinder-head or large valve hav-` stem extending through said guiding-frame,

the small working-valve mounted in said movable head or large valve, provided with'a stem extending through the tubular stem of the cylinder-head, springs pressing the cylinder-head and valven pon theirrespeetiveseats,

7. The combination, with the cylinder of a land the removable dome or hood incl osing the same, substantially as described. A

10. `In a compressor-pump for ice-machines,

the combination, with a stuffing-box for the piston-rod,ot` a perforated gland internally and --exteriorly recessed, located centrally in said box, a gland at the outer end of the box eX- teriorly recessed and perforated, and an oilsupply of a constant pressure connected with the outer gland, and an oil-supply underava- .riable pressure connected with the central gland, substantially as described.

I 11.l The combination, with a cylinder of a compressor-pump for ice-machines, a removav ble cylinder-head, a detachable-scatter the lsamefand a Water-jacket surrounding said cylinder, of a tube passing through the waterjaekct and connecting with the upper part of ing through' the said detachable seat, said tube being provided with avalve-seat in close proximity to'the cylinder, anda valve in said tube, substantially as described.

12. The combination, with the cylinder of a compressor-pump for ice-machines, ot' the cylinder-closing devices consisting ot' the ring J,`

having the internal 'gl1iding-tlanges, J, and guiding-frame X, of the movable cylinderhead having a stem engaging the guidingiframe, the working-\'alve mounted in said movable head, the springs pressing the cylinderlhead and valve upon their respeetive seats,

and the removable dome or hood inclosing the same and disconnected therefrom, substantially as described. l

In testimony whereof I afx my signature in presence of two Witnesses.

. EDGAR PENNEY.

Vitnesses:

D. M. GOOD, Jr., D. C. UNGER.

. the interior of the cylinder by a passage passp 

